Roadmaster Bulb and socket Operating instructions

Brand: Roadmaster

Model: Bulb and socket

Type: Operating instructions

Roadmaster Bulb and socket kit is designed to provide additional lighting options for your towed vehicle. It includes two bulb and socket assemblies, a 6-to-7-wire power cord, a socket bracket, wire connectors, and mounting hardware. You can use it to add taillights, turn signals, and brake lights to your towed vehicle, making it more visible to other drivers. The kit is easy to install and comes with detailed instructions.

drivers behind the towed vehicle will not be alerted when

the motorhome stops, which may cause a collision.

CAUTION

Unless there is at least ¼" of clearance between the

bulb and the lens, the lens will melt and/or discolor.

3. Drill one-inch circular holes through the back of the

taillight housings at the mounting points you have selected.

The holes must be circular, in order to hold the sockets

in place. A hole saw works best, but the shape and location

of some taillights may require a rotary cutting tool.

Be certain not to cut into any wires or other compo-

nents. Severe electrical damage or injury may result.

4. Bend the spring-loaded tabs that encircle the sockets

outward slightly, then snap the sockets into the holes.

If the tabs are not bent, road vibrations will cause the

sockets to fall out of the holes. For this reason, make certain

the sockets are securely attached before continuing.

Note: if one of the holes is not completely circular, bend

one or more of the tabs farther to accommodate the shape

of the hole.

5. Use the butt connectors to attach the four-wire electrical

harness to the sockets. Figure 1 is ROADMASTER's recom-

mended wiring schematic.

Attach the appropriate wires to either one of the sockets.

Then separate the wires, peel back the appropriate wire(s)

to the other side and attach them in the same manner.

Note: use the larger yellow connectors for two-wire

connections; use the smaller blue connectors for single-wire

connections.

6. Use the ring terminal and the self-tapping screw to

continued on next page

Read all instructions before install-

ing the kit components. Failure to un-

derstand how to properly install the kit

could result in property damage, per-

sonal injury or even death.

Required Tools

• 1" hole saw or rotary cutting tool • drill

• wire stripper • wire crimper • test light

Parts List

• a 6- to 7-wire power cord • (1) 6-wire socket

• a 27-foot four-wire flat • (1) socket bracket

• (2) bulb and socket assemblies • (1) ring terminal

• (3) yellow butt connectors and (3) blue butt connectors

• (1) self-tapping screw • (11) wire ties

• three feet of ½" split loom

Installation Instructions

1. The sockets are installed into the back of both taillight as-

semblies. Gaining access to the taillights varies from vehicle

to vehicle, but for many vehicles you can accomplish this by

removing an interior trim panel; for many pickup trucks and

SUVs you must unbolt the taillight from the outside.

2. Look for a location to mount the sockets inside the tail-

light housings. The mounting point should be as flat as pos-

sible and must meet the following conditions: 1) the sockets

must be installed underneath red lenses; and 2) there must

be at least ¼" clearance between the bulbs and the lenses.

Install the bulb sockets underneath red lenses. If

the sockets are installed under amber or clear lenses,

IMPORTANT NOTICE!

Safety Definitions

These instructions contain information that is very important to know and understand. This information is provided for

safety and to prevent equipment problems. To help recognize this information, observe the following symbols:

WARNING indicates a potentially hazardous situ-

ation which, if not avoided, could result in property

damage, serious personal injury or even death.

CAUTION indicates a potentially hazardous situa-

tion which, if not avoided, may result in property dam-

age, or minor or moderate personal injury.

CAUTION

CAUTION used without the safety alert symbol in-

dicates a potentially hazardous situation which, if not

avoided, may result in property damage.

NOTE

Refers to important information and is placed in italic

type. It is recommended that you take special notice of

these items.

Bulb and socket kit

with 6- to 7-wire power cord

part number 1551676-7

Installation Instructions

ROADMASTER, Inc. • 6110 N.E. 127th Ave. • Vancouver, WA 98682 • 800-669-9690 • Fax 360-735-9300 • roadmasterinc.com

All specifications are subject to change without notice.

Time Tested • Time Proven

855851-00 01.18

continued from preceding page

ground the towed vehicle, as shown in Figure 1.

To avoid grounding problems, attach the wire to any

good chassis ground, preferably directly to the frame.

CAUTION

Failure to establish a good ground between the

towed vehicle and motorhome could cause aftermarket

accessories to malfunction, damage to both vehicle's

electrical systems, and other consequential damage.

7. Route the other end of the wiring harness to the front of

the vehicle. Use a route that avoids the possibility of fraying

or melting the wiring against moving parts, sharp edges, the

fuel lines or hot components. (If the OEM wiring harness is

accessible, consider routing the harness alongside it.)

Where sharp edges cannot be avoided, use a section

of the included wire loom to protect the wiring; use one or

more wire ties to secure the wiring in place.

Route the wiring to avoid moving parts, sharp edges,

the fuel lines or hot components such as the engine or

exhaust system.

Wiring exposed by moving parts, sharp edges or hot

components may cause a short circuit, which can result

in damage to the vehicle’s electrical system as well as

other, consequential damage.

Wiring which is attached in close proximity to the fuel

lines may ignite the fuel.

8. If it was necessary to drill a hole, seal it with silicone

sealant after you have routed the harness through.

9. After you route the wiring harness to the front of the

vehicle, you will connect the 4-wire harness to the power

cord's electrical socket. First, you must choose a mounting

point for the included socket —

If the towed vehicle has a Roadmaster Series 4 or 5 EZ

Twistlock

™

baseplate, you will attach the socket to the built-in

mounting posts on the main cross brace.

Otherwise, choose a suitable point to attach the socket

bracket (mounting hardware not included) at the front of the

vehicle, near the center, on the driver's side.

Attach the socket mounting bracket.

10. Remove the rubber boot at the back of the 6-wire socket

and route the wire harness through the socket bracket and

boot.

Attach the wiring to the back of the 6-way socket, ac-

cording to the 6-wire diagram.

Note: leave a 12-inch service loop at the socket for future

modifications. Secure the service loop with one of the wire

ties.

Apply a clear silicone sealant around each wire entry

and set screw indentation to help weatherproof the socket

and secure the set screws.

Reattach the boot.

11. Use the included ½" machine screws and Nylock nuts

to attach the socket to the socket bracket.

12. If the tow bar has channel guides, route the 6- to 7-wire

power cord through the driver's side channel guide. Using

Figure 1

the wiring diagram as a reference, attach the 6-wire plug to

the power cord.

As with the socket, apply a clear silicone sealant around

each wire entry and set screw indentation.

13. Plug the power cord into the motorhome and towed

vehicle; test for proper lighting function.

Socket Pin

Number Circuit

1 ............... Ground

2 ............... Brake light (for separate-to-separate

systems only)

3 ............... Taillight

4 ............... Charge line (not used)

5 ............... Left turn

6 ............... Right turn

7 ............... Auxiliary (not used

front of 7-wire socket

front of 6-wire socket

Socket Pin

Number Circuit

1 ............... Brake light (not used)

2 ............... Auxiliary (not used)

3 ............... Right turn

4 ............... Taillight

5 ............... Ground

6 ............... Left turn

front of 6-wire plug

Socket Pin

Number Circuit

1 ............... Brake light (not used)

2 ............... Auxiliary (not used)

3 ............... Right turn

4 ............... Taillight

5 ............... Ground

6 ............... Left turn

Wiring diagrams

Both of the plugs on the power cord have been wired to

standard electrical codes. To ensure that their wiring matches

the sockets…

• …use the 6-wire diagrams to wire the towed vehicle's

socket and plug; and

• …before towing, use a circuit tester to confirm that the

wiring on the motorhome's 7-way socket matches the dia-

gram of the 7-way socket below.

Roadmaster Bulb and socket Operating instructions

Roadmaster Bulb and socket Operating instructions

Roadmaster Bulb and socket Operating instructions

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